In essence both cases are very similar. I have owned both and I must say the little touches on the Sniper made it my favorite (fan controller with led on/off, dust filters, black interior, more front panel connectivity) but HAF 932 supports E-ATX which is always good.

Don't know why the Sniper doesn't, they are almost the same size...

In the end both great cases!!! Go with the one you think looks the best.